Boat construction



June 18, 1940. a. BROSCHAT BOAT CONSTRUCTION Filed March 2, 1959 2 Sheets-Sheet 1 llllllll S mm W W5 0 m m V f Y H 1 (jUST B BY June 18, 1940. BROSCHAT BOAT CONSTRUCTION 2 Sheets-Sheet 2 INVENTOR. GUST 12520501152? BY M d ATTORNEYS.

Filed March 2, 1939 Patented June 18, 1940 UNITED STATES PATENT OFFICE Application March 2, 1939, Serial No. 259,460

1 Claim. c1. 115-16) This invention relates to improvements in ship constructions, and has particular reference to a means combined with the hull of the ship and the propeller or propellers thereof, whereby a greater efficiency is attained than with the present method of ship propulsion in which the propellers are positioned under the stern of the ship.

The principal object of the invention is to provide improved ship propelling means which l greatly increases the efficiency of the propeller by placing the same within a passageway extending from bow to stern of the ship, whereby when the propeller is rotated a column of water is drawn through said passageway from the bow 15 and forced outwardly through the stern in a powerful propelling jet.

Another object of the invention is to provide a ship construction, whereby the displacement of the ship is reduced to a minimum.

1* A further object of the invention is to provide a mechanism of the character set forth that is simple in construction, economical to manufacture and highly effective in operation.

Other objects and advantages will be apparent fduring the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

-' Fig, 1 is a side elevation of a boat utilizing the principle of my invention, showing portions thereof broken away;

Fig. 2 is a top plan View of Fig. 1;

Fig. 3 is a cross sectional view taken on the o line 3-3 of Fig. l and on an enlarged scale; and

Fig. 4 is an enlarged fragmentary View, showing the propelling mechanism.

Ordinarily, ships are propelled by employing a propeller at the rear of the vessel. Due to the fact that this propeller is in water, there is a great deal of power lost due to side thrust of the propeller. I, therefore, propose to provide a passage through the vessel and to employ a propeller located in this passage, whereby water flowing therethrough is confined and eiiectively moved by the propeller.

In the accompanying drawings wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 5 designates the hull of a ship having a passageway 6 therethrough, which passageway defines a water ballast compartment. Directly above said passageway i3 is a second passageway l, in which is located a propeller 8 driven by a shaft 9 geared 55 to an engine A in any desired manner. This engine is positioned in the engine compartment B, and as illustrated to advantage in Figs. 1 and 4, a water tight casing C is employed that houses therein the mechanism for driving the shaft 9. From the drawings, it will be obvious that water entering the bow D of the boat will flow through the passageway 'i and will be discharged at the rear of the vessel. It will, therefore, be apparent that as the ship proceeds, the water entering the bow D will be confined in the passageway I; and when the propeller 8 is revolved, the water will be moved through the passageway and forcibly discharged at the rear as a solid stream. Consequently, the propeller will have greater effect upon the moving stream of water, and the losses ordinarily encountered with the use of the usual propeller will be greatly minimized, and likewise the displacement of water will be reduced to a minimum.

By virtue of the position of the propeller in the passageway, a dual function of said propeller will be accomplished. It will draw the column of water rapidly through the passageway, which at the same time will force water out through the stern opening, and thus there will be obtained a more efficient pushing action than ordinarily occurs.

The stern of the boat, as designated by the reference character E, is provided with twin rudders iii and ii and a fin it, which rudders are spaced apart to allow the free discharge of water from the compartment 8 and the passageway I. It is to be noted that said rudders are actuated in unison by a tie bar l3 (Fig. 2) and arms 14 and i5 connected at their pivot points it. The usual flexible connections I? are connected to said arms and extend forward over the pulleys Hi to the wheel is in the pilot house of the ship.

While I have shown one form of mechanism for operating the propeller, it is, nevertheless, understood that the propeller shaft that carries thev propeller can extend directly from the engine and at an angle thereto so as to perform the same function as the propeller disclosed. Likewise, the partition that separates the passageway T from the engine compartment can be angularly disposed adjacent the stern of the boat.

From the foregoing description considered in connection with the accompanying drawings, it will be obvious that a ship construction of the character described will readily accomplish all of the objects above set forth,

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same and that various changes relative to the material,

L size, shape and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claim.

Having thus described my invention, I claim: The combination with a vessel having a passageway from bow to stern directly above the keel, a second passage-way extending from bow rudders.

GUST BROSCHAT. 

